HomeAbout UsProductsApplicationsTechnical DataTechnical DataSite IndexSite Map


Prepared by:  R.L. Wigginton                                                        Effective Date: 06/27/96
                    Q.C. Engineer

1. Purpose:

1.1 - The purpose of this specification is to define the parameters of materials, cleaning, inspection, testing, acceptance and rejection criteria of components and assemblies for oxygen system service.

2. Preliminary Inspection:

2.1 - Components shall be visually inspected under normal white light illumination to ensure freedom from chips, burrs, nicks, surface discontinuities and irregularities considered detrimental to form,  fit, function and intended service.  Components exhibiting detrimental characteristics shall be rejected and processed as defined by CPV Q.C.-4.  Conforming components shall be accepted and processed for oxygen service cleaning.

3. Cleaning:

3.1 - Components shall be ultrasonically cleaned by suspended basket immersion in a ten (10) gallon sonic tank powered by a 900 watt source at a cavitation frequency of 40 kHz; employing an aqueous solution; tap water/surfactant-detergent at a bath temperature of 120-140 degrees F.

3.2 - Metallic immersion time shall not exceed ten (10) minutes.

3.3 - Non-metallic immersion time shall not exceed five (5) minutes.

3.4 - Components are removed from the sonic tank, rinsed under hot tap water followed by blow drying with oil free high purity dry nitrogen.

4. Post Cleaning Inspection:

4.1 - Components shall be inspected under black light illumination to ensure freedom from lint and hydrocarbon contamination.  Components exhibiting fluorescence in the forms of blots, blotches, smears, smudges or films shall be recleaned as defined in Section 3.  Components incapable of passing the black light inspection shall be rejected and processed as defined in CPV Q.C.-4.  Components passing black light inspection shall be processed for assembly and testing.

5. Lubrication:

5.1 - Unless otherwise specified by procurement request, lubrication for O-seal type valves/cartridges shall be halocarbon grease series 25-1 OM; a blend of completely halogenated chlorofluorocarbons, completely inert to all acids, alkalis and oxidizing agents.’

5.2 - Unless otherwise specified by procurement request, sealant used for threads of threaded seat check valves shall be Oxylube, manufactured by Drilube Co.

6. Valve/Cartridges Assembly:

6.1 - Valves/cartridges are assembled in a segregated area with the work surface covered by clean Kraft paper.  Tools used in assembly shall be kept separate from other tools or thoroughly cleaned prior to use.  Assembly personnel shall have clean hands or clean gloves.

7. Pressure Testing:

7.1 - Prior to testing fittings shall be thoroughly cleaned.

7.2 - Unless otherwise specified by procurement request, valves/cartridges are pneumatically tested employing high purity oil free dry nitrogen as the  test media.  An aqueous solution of approved soaps such as Leak-Tek, Snoop, Sherlock, Formula #16 or Formula FM-1 shall be used to check for leakage during pressure testing.

7.3 - After testing, soap solution shall be thoroughly rinsed off of tested units with hot tap water, followed by thoroughly drying the tested units with high purity oil free dry nitrogen.

8. Protection:

8.1 - Union ends of O-seal valves and bonnets of  O-seal cartridges shall be Covered with clean plastic caps followed by heat sealing in clean polyethylene bags.

9. Identification:

9.1 - Tags shall be firmly affixed to valves/cartridges or enclosed within the polyethylene bags with the cleaned and tested units.  Tags shall reflect the
following information:


This part has been cleaned for oxygen service application

________________________Do not open until ready for use______________________

Cleaned for Oxygen Service by: _________________________ Date: ______________

Contract/P.O. No. ________________________________CPV S.O. No. ____________

Home | About Us | Products | Applications | News | Technical Data | Contact Us | Site Map